Search Results - "Silva, Joao M N"

Seasonality of vegetation fires as modified by human action: observing the deviation from eco-climatic fire regimes by Le Page, Yannick, Oom, Duarte, Silva, João M. N., Jönsson, Per, Pereira, José M. C.

“…In any region affected, fires exhibit a strong seasonal cycle driven by the dynamic of fuel moisture and ignition sources throughout the year. In this paper we…”
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Spectral-Based Monitoring of Climate Effects on the Inter-Annual Variability of Different Plant Functional Types in Mediterranean Cork Oak Woodlands by Soares, Cristina, Silva, João M. N., Boavida-Portugal, Joana, Cerasoli, Sofia

“…Using remotely sensed data to estimate the biophysical properties of vegetation in woodlands is a challenging task due to their heterogeneous nature. The…”
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Temporal dynamics of spectral bioindicators evidence biological and ecological differences among functional types in a cork oak open woodland by Cerasoli, Sofia, Costa e Silva, Filipe, Silva, João M. N.

“…The application of spectral vegetation indices for the purpose of vegetation monitoring and modeling increased largely in recent years. Nonetheless, the…”
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Regional-scale burned area mapping in Mediterranean regions based on the multitemporal composite integration of Sentinel-1 and Sentinel-2 data by De Luca, Giandomenico, Silva, João M. N., Modica, Giuseppe

“…Wildland fires are among the main factors affecting the surrounding territory in terms of ecological and socioeconomic changes at different temporal and…”
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Short-term temporal and spatial analysis for post-fire vegetation regrowth characterization and mapping in a Mediterranean ecosystem using optical and SAR image time-series by De Luca, Giandomenico, Silva, João M. N., Modica, Giuseppe

“…In the present study, the temporal and spatial dynamics of the post-fire recovery of different Mediterranean vegetation types during the three years after the…”
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Using Digital Photography to Track Understory Phenology in Mediterranean Cork Oak Woodlands by Jorge, Catarina, Silva, João M. N., Boavida-Portugal, Joana, Soares, Cristina, Cerasoli, Sofia

“…Monitoring vegetation is extremely relevant in the context of climate change, and digital repeat photography is a method that has gained momentum due to a low…”
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Object-Based Land Cover Classification of Cork Oak Woodlands using UAV Imagery and Orfeo ToolBox by De Luca, Giandomenico, N. Silva, João M., Cerasoli, Sofia, Araújo, João, Campos, José, Di Fazio, Salvatore, Modica, Giuseppe

“…This paper investigates the reliability of free and open-source algorithms used in the geographical object-based image classification (GEOBIA) of very high…”
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Integrated use of Sentinel-1 and Sentinel-2 data and open-source machine learning algorithms for land cover mapping in a Mediterranean region by De Luca, Giandomenico, M. N. Silva, João, Di Fazio, Salvatore, Modica, Giuseppe

“…This paper aims to develop a supervised classification integrating synthetic aperture radar (SAR) Sentinel-1 (S1) and optical Sentinel-2 (S2) data for land…”
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Cork oak woodland land-cover types classification: a comparison between UAV sensed imagery and field survey by Heuschmidt, Florence, Gómez-Candón, David, Soares, Cristina, Cerasoli, Sofia, Silva, João M. N.

“…This work assesses the use of aerial imagery for the vegetation cover characterization in cork oak woodlands. The study was conducted in a cork oak woodland in…”
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Spatiotemporal trends of area burnt in the Iberian Peninsula, 1975–2013 by Silva, João M. N., Moreno, Maria Vanesa, Le Page, Yannick, Oom, Duarte, Bistinas, Ioannis, Pereira, José Miguel C.

“…In Portugal and Spain, fire regimes have been significantly altered due to changes in anthropogenic and climatic factors. The development of a fire management…”
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Integration of Optical and SAR Data for Burned Area Mapping in Mediterranean Regions by Stroppiana, Daniela, Azar, Ramin, Calo, Fabiana, Pepe, Antonio, Imperatore, Pasquale, Boschetti, Mirco, Silva, Joao M N, Brivio, Pietro A, Lanari, Riccardo

“…The aim of this paper is to investigate how optical and Synthetic Aperture Radar (SAR) data can be combined in an integrated multi-source framework to identify…”
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Modelling spectral reflectance of open cork oak woodland: a simulation analysis of the effects of vegetation structure and background by Häusler, Melanie, Silva, João M. N., Cerasoli, Sofia, López-Saldaña, Gerardo, Pereira, José M. C.

“…This study analyses the influence of vegetation structure (i.e. leaf area index and canopy cover) and seasonal background changes on moderate-resolution…”
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Optimal attributes for the object based detection of giant reed in riparian habitats: A comparative study between Airborne High Spatial Resolution and WorldView-2 imagery by Fernandes, Maria Rosario, Aguiar, Francisca C, Silva, Joao MN, Ferreira, Maria Teresa, Pereira, Jose MC

“…Giant reed is an aggressive invasive plant of riparian ecosystems in many sub-tropical and warm-temperate regions, including Mediterranean Europe. In this…”
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Semi-Automatic Methodology for Fire Break Maintenance Operations Detection with Sentinel-2 Imagery and Artificial Neural Network by Pereira-Pires, João E., Aubard, Valentine, Ribeiro, Rita A., Fonseca, José M., Silva, João M. N., Mora, André

“…The difficult job of fighting fires and the nearly impossible task to stop a wildfire without great casualties requires an imperative implementation of…”
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Spatial and Temporal Trends of Burnt Area in Angola: Implications for Natural Vegetation and Protected Area Management by Catarino, Silvia, Romeiras, Maria Manuel, Figueira, Rui, Aubard, Valentine, Silva, João M. N., Pereira, José M. C.

“…Fire is a key driver of natural ecosystems in Africa. However, human activity and climate change have altered fire frequency and severity, with negative…”
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Assessing tree crown fire damage integrating linear spectral mixture analysis and supervised machine learning on Sentinel-2 imagery by De Luca, Giandomenico, Modica, Giuseppe, Silva, João M. N., Praticò, Salvatore, Pereira, José M.C.

“…Crown fire damage is a mixture of three principal fire-related components: charred material, scorched foliage, and unaltered green canopy. This study estimated…”
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Fully Automated Countrywide Monitoring of Fuel Break Maintenance Operations by Aubard, Valentine, Pereira-Pires, João E., Campagnolo, Manuel L., Pereira, José M. C., Mora, André, Silva, João M. N.

“…Fuel break (FB) networks are strategic locations for fire control and suppression. In order to be effective for wildfire control, they need to be maintained…”
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Analysis of Trends in the FireCCI Global Long Term Burned Area Product (1982–2018) by Otón, Gonzalo, Pereira, José Miguel C., Silva, João M. N., Chuvieco, Emilio

“…We present an analysis of the spatio-temporal trends derived from long-term burned area (BA) data series. Two global BA products were included in our analysis,…”
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Long-Term Monitoring of Cork and Holm Oak Stands Productivity in Portugal with Landsat Imagery by Aubard, Valentine, Paulo, Joana Amaral, Silva, João M.N.

“…Oak stands are declining in many regions of southern Europe. The goal of this paper is to assess this process and develop an effective monitoring tool for…”
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Sun protection behaviour and skin cancer literacy among outdoor runners by Duarte, Ana Filipa, Nagore, Eduardo, Silva, João N. M., Picoto, António, Pereira, Altamiro C., Correia, Osvaldo J. C.

“…Background Outdoor runners have an increased risk of melanoma and non-melanoma skin cancer. Objectives The purpose of this study was to assess skin cancer…”
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